强激光与粒子束2011，Vol.23Issue(9)：2369-2372,4.DOI:10.3788/HPLPB20112309.2369
中心波长2.33μm附近CO和CH4分子的同时探测
Simultaneous trace detection of carbon monoxide and methane at 2.33 μm
摘要
Abstract
The spectrum of a series of low concentration carbon monoxide and mixed gas (carbon monoxide, methane and nitrogen) was obtained around 2. 33 fim using a tunable distributed feedback semiconductor laser with an astigmatic mirror multipass absorption cell (optical path length 100 m) at room temperature through direct absorption technique. The absorption lines of carbon monoxide at 4 288. 289 8 cm-1 and methane at 4 287. 650 15 cm-1 were chosen for trace detection. At the total pressure of 40 698 Pa, the detection limits of carbon monoxide and methane were gotten respectively, I. E. 8. 15 × 10-6 for carbon monoxide (signal-to-noise ratio is about 216) and 18. 48 × 10-6 for methane (signal-to-noise ratio is about 147).关键词
直接吸收光谱/离散型多通吸收池/CO/CH4/探测极限Key words
direct absorption spectroscopy/ astigmatic mirror multi-pass absorption cell/ carbon monoxide/ methane/ detection limit分类
数理科学引用本文复制引用
赵辉,刘锟,蔡廷栋,谈图,汪磊,高晓明..中心波长2.33μm附近CO和CH4分子的同时探测[J].强激光与粒子束,2011,23(9):2369-2372,4.基金项目
国家高技术发展计划项目(2009AA06Z204) （2009AA06Z204）
安徽省自然科学基金项目(11040606M147) （11040606M147）
